Fabio Valentini wrote:
> Sure, but is this doable? CMakeLists.txt files are very complex and
> border on a Turing-complete language.
Technically, CMake *is* a Turing-complete language – if and only if you use
recursive functions.
> Does cmake support passing in "-D foo" options and returning a list of
> dependencies it wants for those options?
> Because otherwise you'd be back to reimplementing a CMake file format
> parser / interpreter just to get the list dependencies you need.
I would suggest just doing a regex grep for find_package(Foo … REQUIRED),
similar to how the Python autoRequires generator works. Python is also a
Turing-complete language, and (as I understand it) also allows imports in
the middle of the code, yet nobody would expect the autoRequires generator
to do the right thing for:
if some_library_function():
import foo
foo.bar()
depending on whether some_library_function() is always true, always false,
or sometimes either. The semantics would be similar for the CMake
autoRequires generator. It can always be turned off, filtered, and/or
missing dependencies manually added. It would still be better than nothing.
Kevin Kofler
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